Variable condenser



June 14,, 1927.

R. H. MANSON VARIABLE'QONDENSER Filed Nov. 24, 1924 2 Sheets-Sheet lINVENTOR EAY Hv MANsoN BY A) ATTORNEY June 14, 1927. 1,632,488

R. H. MANSON VARIABLE CONDENSER Filed Nov. 24, 1924 2 Sheets-Sheet 2 AD54 \a as 51 INVENTOR QAY H. MANSON ATTORNEY patented dune lid, tea,

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Application tiled November a l,

This invention relates to variahle electrical condensers. In formervariable electrical condensers it has been customary to make the freeend of the rotor shaft for mounting the dial or other controlling meansof some standard fixed length, so that it it is used with panels ofwidely difierent thicknesses, certain means has been necessary tocompensate for these inequalities. Furthermore when such a condenserunit is employed in a multi-umt condenser, it has been dificult toadjust the rotor plates of the several units, so that the rotation ofthe common shaft with its rotor units produces an equal change incapacitance in each of the condenser units.

One of the features of the present, invention resides in the arrangementoil parts whereby the condenser lends itself readily to mounting onpanels of various thichnesses.

Another feature of this invention resides in the provision of meanswhereby the several rotor elements of a plurality of condenser units ina multi-unlt condenser may be readily adjusted on a common shaft.

An additional feature of the invention appears in the design of variousparts, whereby the condenser is eficient electrically, sturdymechanically, as well as simple to manufacture and capahle of accurateadjustment.

In the drawings Fig. i represents top view of a single variablecondenser which is herein referred to as a condenser unit. In this viewcertain of the parts have loeen broken away to disclose more clearly thedetail arrangement. Fig. 2 is a sectional view taken on the line 22 oi1,.looking in the direction of the arrows. Fig. 3 is a view of one ofthe rotor plates, while F ige is a view of a stator plate, Fig. 5 showsa View of a side piece of the frame. Fig. 6 is a side view with certainparts omitted, showing several condenser units mounted to form amulti-unit condenser. Fig. 7 shows a detail view of a cam.

Referring to Fig. 1, 7 re resents two side members, the outline of w ichis shown in Fig. 5. Each side member has cut-out pen serial lilo.751,839.

of the blocks 13 and a portion or the block 13 is forced into openings14, to lock the plate in engagement with the block. Each block 13, asshown in Fig. 1, has two restricted end portions, one of which is'threaded, which portions are mounted in openings in the lolocks ofinsulation 10. Nuts and lock washers 16 engage two sides of the lowerlolocks 10, of Fig. 1, so that the with respect to the rotor plateswhich will he reierred'to later. llt will he noted that only one locknut 16, of each pair, is shown, the'second lock nut of each pair beingconcealed, since it lies in the plane of the lower side member '2'.

Each of the side members 7 is provided with a spring hearing shown inFig. 5. This hearing is formed by cutting an elongated opening in theframe member 7, to provide a long spring element 17. At point in=termediate or? the length at this element there is located asemi-circular cut-out portion registering with a similar cut-out portionof the main part of the member 7, which together define a circularopening to receive a hollow shaft, such as 18. A llshaped saddle 19, issecured to the main portion oi the frame 7, near the tree end of springelement 17, in any well known stator plates 12 may be adjusted as a unitmanner, while a set screw 40 is threaded free ends of the plates 21 infixed relation.

The circular spacers 50 formed of insulation and appearing at each sideof the rotor unit are of larger diameter than spacers 51 and arearranged to engage the edges of two stator plates to limit the rotationof the rotor unit in one direction. A, collar 26 clamped to thelowermost end of the shaft 18, as shown in Fig. 1, holds the rotor unit.against end play while a leaf spring 27 frictionally holds the rotorunit in the position to which it has been adjusted. A stub shaft 60 isadjustably held in the hollow shaft 18 by a set screw 20, so that it maybe extended various distances beyond the lower frame member 7. A stubshaft of greater length than that shown at 60, may be adjusted to extendfrom either side of the condenser.

In the modified form of the invention, a multi-unit condenser shown inFig. 6 consists of a plurality of condenser units such as that shown inthe preceding figures. This multi-unit condenser with the exception ofthe structural differences of the condenser unit may be substantiallysimilar to the multi-unit condenser in applicants co-pending applicationSerial No. 693,382, filed February 16, 1924. In the present multi-unitcondenser, a plurality of condenser units are mounted in parallelrelation on the common shaft 27, by inserting this shaft through the vhollow shafts 18 of the condenser rotor units and then locking theserotor units in place by set screws 20. These units thus secured on theshaft 27 are mounted in a frame consisting of uprights 28 and 29provided with brackets such as 30, to which side-bars such as 31 aresecured to hold the uprights in spaced relation. The collars 53 securedto the shaft 27, by means of set screws 5 1, engage the sides of theuprights 28 and 29 to hold the shaft 27 against longitudinal movement.The uprights 28 and 29 are provided with two sets of spring bearings,such as shown and described in the preceding figures. One of these setsof bearings receives and supports the shaft 27 and the other set ofbearings supports a second shaft as will be further described. Thestator element of the condenser unit at the right of Fig. 6 is Securedin fixed position to one of the sidebars 31, by means of a bracket 51fastened to the side-bars and to the frame 7 of this unit.

The stator element of the condenser unit at theleft of this figure ismounted for limited rotation on the hollow shaft 18. This rotation iscontrolled as follows: The shaft 32 carries a cam 55, with which a pin57 on arm 56 of the left hand frame member 7 is arranged to engage.A'spring 58 secured to a bracket on the upright 28 and to a projection59 carried by the frame member 7 of the stator unit, tend; to rotate thestator unit in a clock-wise direction. This motion is limited by thepin-57 engaging the cam 55.

When it is desired to rotate the stator unit the shaft 32 is turned by adial or other well known means (not shown) and the spring 58 holds thepin 57, carried by the arm 56 of the stator unit on the surface of thecam 55. In this Way the rotation of the stator unit is limited anddetermined by the cam 55. In this multi-unit condenser the rotation ofthe shaft 27 simultaneously rotates the rotor units, while the statorunits are held stationary. The stator unit at the right of Fig. (3 isheld fixed by the frame, but the stator unit at the left of this fi meis mounted for limited movement in the manner already described, so thatthe capacitance of both of the condensers may be adjusted to exactly thesame value, even if the various elements of the condensers orconnectedcircuits possess slight variations due to manufacturing.

While Fig. 6 shows only two condenser units, it will be understood thatone or more units similar to that shown at the left of this figure maybe provided. The stator units of any additional condenser units must hemounted for limited rotation in the same manner as the unit shown at theleft of Fig. 6. For each unit there must be provided a shaft. such as32, carrying a cam similar to and each stator unit must he provided withan arm, such as 56 and a pin similar to 57 with a con! rolling springsuch a 58. The manner in which three condenser units arc mounted in onestructure will be apparent from applicants mentioned co-pendinpapplication.

What I claim is:

1. In an electrical condenser, a frame provided with two hearings inalignment, a stator unit secured to said frame. said unit consisting ofa plurality of spaced metal plates in conducting relation, a hollowshaft mounted in said bearings, adrive shaft mounted within andadjustably coupled to said hollow shaft, and a plurality of spaced rotorplates in conducting relation secured on said hollow shaft, said hollowshaft and its rotor plates being movable With respect to said statorplates.

In an electrical condenser, a frame provided with two spaced hearings inalignnesaaes rality-of 'spaced'rotor plates in conducting relationsecured on said hollow shaft, said hollowsh'aft and its rotor platesbeing associated with/and movable with respect to said stator plates,and a drive shaft 1nserted within said hollow shaft and fastens thereto.7 Y

3. Ina multi-unit condenser; a frame, a

- main shaft rotatably mounted in said frame,

a plurality of rotor units mounted on said main shaft, each rotor unitcomprising a hollow shaft, a plurality of metal plates se-= cured tosaid hollow shaft, and a stator unit associated with each rotor unit,each stator unit consisting of a plurality of spaced metal plates, atleast one of said stator units being rotatable on the hollow shaft ofits associated rotor unit. 4. In a multi-unit condenser; a support, amain shaft rotatably mounted in said support, a plurality of rotorunits, each rotor unit consisting of a hollow shaft, and a plurality ofspaced metal lates secured thereto, the hollow shaft of eac rotor unitbeing adjustably mgunted on said main shaft, and a stator unitassociated with each rotor unit, each stator unit consisting of aplurality of spaced metal plates in conducting relation, at least one ofsaid stator units being rotatable on the hollow shaft of its associatedrotor unit.

5. In a multi-unit condenser; a support; a main shaft rotatably mountedin said support; a plurality of rotor units, each rotor unit" consistingof a hollow shaft, and aplurality of spaced metal plates securedthereto, the hollc w shaft of each rotor unit being adjustably mountedon said main shaft, and a stator unit associated with eachrotor unit,each stator unit consisting of a plurality of spaced metalplates inconducting relation, at least one of said stator units being rotatablymounted on the hollow shaft of its associated rotor unit.

6. In a multi-unit condenser; a plurality of spaced supports; a mainshaft rotatably mounted in said supports" a plurality of condenserunits; each of sai condenser units consisting of a frame, a stator unitin said frame com osed of spaced metal plates, a hollow sha mounted insaid frame, spaced rotor plates secured to said hollow shaft forinconducting relation, a hollow shaft mounted in said bearings, and aplurality of metal plates in conducting relation secured on said shaft,said shaft and its rotor plates being adjustable with respect to saidstator plates.

8. In an electrical condenser, a frame having two metal uprights withportions cut out to form a spring bearing, a stator unit insulatedlysecured to said frame, said unit consisting of a plurality of spacedmetal plates in conducting relation, a hollow shaft mounted in saidbearings, a plurality of spaced metal plates in conducting relationsecured on said shaft, said shaft and its rotor plates being rotatablewith respect to said stator plates, and saddles for varying theadjustment of said spring bearings.

9, In a multi-unit condenser; a frame, a main shaft rotatably mounted insaid frame, a plurality of rotor units secured on said shaft, each rotorunit comprising a hollow shaft and a plurality of'metal plates securedthereto, a stator unitassociated with each rotor unit,each stator unitconsisting of a plurality of spaced metal plates in conducting relation,at least one of said stator units being arranged for rotation about thehollow v shaft of its associated stator unit.

10.. In a multi-unit variable condenser, a frame including spaceduprights having bearings a main shaft rotatable in certain of saidbearings, a plurality of rotor units secured in spaced relation on saidshaft, each rotor unit consisting of a hollow shaft having a pluralityof rotor plates secured thereto, said main shaft being threaded throughsaid hollow shafts, a stator unit insulatedly associated with each ofsaid rotor units, at least one of said stator units being mounted forrotation on said hollow shaft, a second shaft mounted in certain of thebearings of said uprights, a cam secured on said last mentioned shaft,an arm secured to said last mentioned stator unit and having a portionin engagement with said cam, whereby the rotation of said second shafttends to rotate said last mentioned stator unit.

11., In an electrical condenser, '21 frame provided with two hearings inalignment, a stator unit rotatably mounted in said frame, said unitconsisting of a plurality of spaced metal plates in conductive relation,a rotor units consisting of a frame, a stator unit composed of spacedmetal plates mounted in GERT IFIGATE OF Patent No. 1, 632, 488.

spect to said supports; another stator unit being rotatable aboutsaidmain shaft; and

means including a cam for effecting limited 7 rotation of said lastmentioned stator unit.

In Witness whereof, Ihereunto subscribe my name this 19th day ot Nov A.D. 1924.

RAY H. MANSON.

CORRECTION.

Granted June 14, 1927, to

RAY H. MANSON.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 3,line 93, claim 9, for the word "stator" read "rotor"; and that the saidLetters Patent lbould be read with this correction therein that the thecase in the Patent Office.

same may conform to the record of Signed and sealed this 2nd day ofAugust, A. D. 1927.

Seal.

M. J. Moore, Acting Commissioner of Patenta.

